If you have downloaded and installed the Office software from your Office 365 account then you should find that Skype for Business has been installed along with it.
Go to go.soton.ac.uk/365login
Log into the University gateway page
At the top of your Office 365 page, choose > Office 365 settings.
Choose Install and manage software.
Choose Skype for Business, select language, and choose Install.
At the bottom of your screen, choose Save as to save the setuplyncentryretail.exe file to your computer.
Important Note where you saved the setuplyncentryretail.exe file on your computer. If Skype for Business stops during setup, this is where you go to re-run it.
After the setuplyncentryretail file has downloaded, choose Run.
At the next page, choose Learn more read the license agreement, and choose Accept to agree to it.
Once completed installing Skype for Business, you are now ready to sign in to Skype for Business for the first time.